Secrets management is the discipline of storing, sharing and rotating sensitive credentials such as passwords, API keys and certificates in a safe, controlled way rather than scattering them across code, config files and chat messages. A dedicated tool holds these values encrypted, hands them out only to the systems that need them, and keeps a record of who accessed what.
Think of a hotel key safe behind the reception desk. Staff do not write the master codes on sticky notes; they request a key from the safe when they need it, and every handout is logged. A secrets manager does the same for your software: the credentials stay locked away, applications fetch them on demand, and nothing sensitive sits out in the open.
This matters because leaked credentials are one of the most common ways systems get breached. A single AWS key committed to a public GitHub repo can be found by automated scanners within minutes. Keeping secrets encrypted at rest and rotating them regularly through API key rotation means that even if one value is exposed, the window to abuse it is short. Good secrets management also makes audits far simpler, because access is recorded in one place.
A practical first step is to scan your own repos for secrets that slipped in long ago, since rotating a leaked key does nothing if the old one still sits in git history. Pair that with access control so each service reads only the secrets it actually needs, and the blast radius of any single leak stays small.
At TopDevs we keep every credential out of the codebase and inside a managed vault, so a leaked file or an old laptop never becomes the thing that opens your whole system.
